Hi, This crash occurs on my system as well. I managed to locate a workaround in Chakra Linux gitlab:
https://code.chakralinux.org/chakra/packages/desktop/issues/79#note_5741 MESA_GL_VERSION_OVERRIDE=3.2 unknown-horizons This allows UH to start. -- System Information: Debian Release: bullseye/sid APT prefers testing APT policy: (990, 'testing'), (500, 'unstable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 5.4.0-4-amd64 (SMP w/4 CPU cores) Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=fi_FI.UTF-8, LC_CTYPE=fi_FI.UTF-8 (charmap=UTF-8), LANGUAGE=fi_FI.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages unknown-horizons depends on: ii python3 3.8.2-2 ii python3-enet 0.0~vcs.2017.05.26.git-2.2+b1 ii python3-fife 0.4.2-2 ii python3-future 0.18.2-1 ii python3-yaml 5.3.1-1 ii ttf-unifont 1:12.0.01-2 unknown-horizons recommends no packages. unknown-horizons suggests no packages. -- no debconf information